Mushrooming bullets.



c. H. A. F. L. Ross. -MUSHROOMING BULLETS.

ALPLICATION FILED FEB. 13.1915.

Patented June 1, 1915.

ran

CHARLES HETRY AUGUSTUS FREBERICK LQCKHART RUSS, DF BALNAGOWN GASTE, COUNTY OF 3.65%, SCGTLANQ.

MUSHROOMNG BULLETS.

Specification of Letters Patent.

Patented June 12H5.

T0 all whom t may concern.'

Be it known that I, CHARLES HENRY AUGUSTUS FREDERICK Loc-Knaur ltoss,as1ib ject-of the King of Great Britain, residing at Balnagown Castle, Rossshire, `Scotland,

l have invented certain new and useful linprovernents in lliushrooming Bullets; and l do hereby declare the following to be a Full, clear, and eXact description of lthe invention, such as will enable others skilled in the art to Which it appertains to make and use the same.

This invention relates to jacketcd bullets, for sporting purposes, and has for its object to improve the construction of thc bullet disclosed in the U. S. Patent No. 949,028, dated February 15, 1910, and entitled Bullets.

To these ends the invention consists in the novel details of construction and combinations of parts more fully hereinafter disclosed and particularly pointed out in the claims.

Referring to the accompanying drawings forming a. part of this specification, in which like numerals designate like parts in all the views :-F igure 1 is a plan view partly in section of a bullet made in accordance with the present invention; Fig. 2 is a view similar to Fig. '1, but showing a slightly modified form of mushrooming tube; Fig. 3 is a sectional vien7 of the mushrooming tube removed from 'the bullet, shown in Fig. l; F ig. 4 is a, like View of the inushrooming tube shown in Fig. 2; Fig. 5 is a diagrammatic view in section, illustrating how the mushrooming tubes are first drawn; Fig. 6 'is a diagrammatic view in section illustrating how said .mushrcoming tubes are later closed by die hammer blows; and Fig. 7 is a diagrammatic View in section of a bullet provided with a mushrooming tube in accordance with U. S. Patent No. 949028 above mentioned, and showing the defects therein greatly exaggerated.

l indicates the original jacket of a bullet provided with the usual filling mateal 2,

and 3 illustrates a mushrooniing tube placed in the pointedend oi' the bullet having a y closed end Il and a pointed closed end 5l all as will be clear from the draw-ings.

In the prior U. S. Patent No. 949028 above, the inner end 4 of the tube 3 was left open as indicated at 5, in Fig. 7, and the pointed head 7 closed, as will be clear om the said patent and the said figure.

in order to render clear the difference between the present invention and that of the prior patent above, it is said :-The tubes 3 were drawn in dies as illustrated in Fig. 5, leaving a bottom, such as fi integral therewith, and the said bottom el was put into a suitable die shapingr apparatus having hammers S (see Fig. (i) whereupon the said hammers 8 delivered a multitudinous number of light hanuner blows upon the closed end si. of the tube. These blows cause the head Ll of the tube 3 to assume the particular shape shown in Fig. 7. lt was found however alter considerable experience in actual use that the bullets thus shaped did not always mushroom with uniformity, nor were they under all circumstances sulticiently accurate in flight to warrant complete satisfaction, to the user. A lter a series of experiments, extending over a considerable time, the cause of these ol'ijeetions were licund to reside in the `fact that the bottom il ol' the tubes 3 were always more or less thickened over the Walls of the tube as is indicated by 9. This thickening ol the bottoms Ll is an unavoidable incident due to the drawing operation, because the metal of necessity flows more uniformly and freely along the Walls of the tube Where the pressin-e isv greatest than it does along the bottoni of the tube. Further, the tubes of necessity being quite small and the Walls thereof of necessity being quite thin, the above thickening of the bottoms 4 is not as apparent as it would otherwise be. Upon careful calibration of the bottom and walls of a large number of tubes I have found that the bottoms of the tubes are not only often several times thicker than are the Walls of the tubes, but that this thickness of the bottoms causes the hammer blows 8 on said bottoms 4 to so shape the ends 7 of the tubes 3 that the walls of the said ends have varyingn degrees of thickness as indicated at 11 and l2 in Fig. 7. These varying degrees of thickness of course cause the head 7 to lack uniformity in their mushrooming actions, and therefore to give rise to the above objections to the bullets disclosed in said Patent No, 949028. x

New' this invention avoids the above obw jcctious by pl: lug the thickened bottoms 4 of the tubes in ide the bullet body, instead of outside ther ci?, as will be clear -from Figs. 'l and Hubby causing the blows of the hanmiers 8 to close the Wallsbf the ,g si :45.1.1

outer contour or shape of the bullet causes considerable deviation or inaccuracy over long hgbts and therefore it 1s of the utmost in'iportance to not only have a uniform andA accurate outer contour, but in mush rooming bullets ifs-of equal iniportance to have a uniform mushroomi'ng, action, because if a bullet mushrooms while in flight, of Course its accuracy is at once destroyed. The saine is true if the head 5 or 7 of the tube is injured in packing or in loading.

In the modified forni of myv invention dis` closed in Figs. 2 and 4 the extreme end loi Y' the tube 3 is substantially closed. but not elosed to the same extent as are the extreine ends of the tubes shown in Figs. 1 and 3. Or if the said end 15 is in fact Closed it is left blunt as indicated to 'facilitate the mushrooxning action. Accordingly it Will be observed that by the simple expedient ofplaeing the closed end 4C of the tube 3 inside the bullet instead o1"A outside thereof, and by closing,r or substantially closing lby hammer blows the open end of the tube to form the ,and conforming to git above disclosure except as may be required by the claims.

13A sharp nosed bullet comprising e mushrooining tube having'a pointed outer 'end composed of a wall .of uniform'tliiekness formed. by closing the open end of the tube and provided with an integral bottoni, located in the body ofthe bullet, substantially as described.

2. A sharp nosed bullet comprising a mushrooining tube having a pointed outer end composed of a wall. of uniform thickness formed by closing the outer contour ofthe uoselof` he ,bullet said tube being provided w'ithi an ,integral bottonilocated in the body of the bullet, substantially as described.

In testimony whereof I ailix my signature, in presence of two witnesses.

, CHARLES HENRY AUGUSTUS i FREDERICK LOCKHART ROSS.

Witnesses I. E. PooooK, J. E. MGCANN.

the open end of the tube uw 

